VANDENBERG AIR FORCE BASE, Calif. - This is the mission patch for the CALIPSO/CloudSat mission showing the dual spacecraft. It hangs on the wall inside the Astrotech Payload Processing Facility at Vandenberg Air Force Base in California, where the CALIPSO/CloudSat spacecraft is being readied for launch. CALIPSO stands for Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation. It will fly in combination with the CloudSat satellite to provide never-before-seen 3-D perspectives of how clouds and aerosols form, evolve, and affect weather and climate. CALIPSO and CloudSat will join three other satellites in orbit to enhance understanding of climate systems. Launch of CALIPSO/CloudSat is scheduled for April 21.